JPH0480694B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a medical skin cutting tool having a cylindrical cutting edge.

(Prior Art) Conventionally, as shown in FIGS. 6 to 8, a cylindrical blade part 1 and a blade part 2 are used to cut the skin S by applying a cylindrical blade tip 3 to the skin S and rotating it. Medical skin cutting instruments that cut in a circular shape are known.

(Problem to be Solved by the Invention) However, since the inner peripheral surface 3a of the cutting edge 3 has the same diameter d, when the cutting tool is separated from the skin S,
The skin piece S1 that has entered the inside of the cutting edge 3 during cutting is difficult to come off from the inner circumferential surface 3a and remains attached to the cutting tool. Therefore, it was troublesome to take out this skin piece S1.

Structure of the Invention (Means for Solving the Problems) The present invention was made in view of this problem, and consists of a cylindrical blade portion whose handle and outer peripheral surface have the same diameter and a cutting edge at the lower end. The inner peripheral surface is expanded outward so that the lower end side is widest.

(Function) Then, the circularly cut skin piece S1 enters the inner circumferential surface 3a of the cutting edge 3.However, as described above, the inner surface expands outward so that the lower end side is widest. Therefore, it acts in the same manner as a so-called draft slope, and when the cutting tool is moved a little away from the skin, it becomes difficult for the adhesive force to act between the skin piece S1 and the inner circumferential surface 3a of the cutting edge 3, It becomes easier to leave.

(Example) First, a first example of the present invention will be described with reference to FIGS.

The cylindrical handle 1 has a blade 2 whose outer circumferential surface has the same diameter.
is fitted, and a cutting edge 3 is formed at the lower end of the blade portion 2. The diameter d of the inner circumferential surface 3a of this cutting edge 3 is widened outward so that it is widest at the lower end.

Then, by applying the cylindrical cutting edge 3 to the skin S and rotating it, the skin S can be cut into a circular shape. During this cutting, the circular skin piece S1 enters the inside of the cutting edge 3, but the inner peripheral surface 3a
Since it has the above-mentioned structure, it acts in the same way as a so-called draft slope, and when the cutting tool is separated from the skin S, an adhesive force acts between the skin piece S1 and the inner circumferential surface 3a of the cutting edge 3. Therefore, the skin piece S1 remains on the skin S without adhering to the cutting tool.

Next, other embodiments will be described.

The second embodiment shown in FIG. 3 is the same as the first embodiment in which the circular tip of the cutting edge 3 is inclined with respect to the axis and is slightly concave, and the third embodiment shown in FIG. The fourth embodiment shown in Fig. 5 has a straight tip, and the tip has an uneven tip.
In both embodiments, the lower end side of the inner circumferential surface 3a of the cutting edge 3 is expanded outward so that it is widest, and as in the case of the first embodiment, the skin piece S1 after cutting is difficult to adhere to the cutting tool. .

Effects of the Invention In short, according to the present invention, the inner circumferential surface 3a of the cutting edge 3
By spreading, the cut skin piece S1 becomes difficult to adhere to the inside of the cutting edge 3, so that it can be easily peeled off.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view showing a state in which a cutting tool according to a first embodiment of the present invention is applied to the skin and cutting it, and FIG. 2 is a partial cross-sectional view showing a state in which the cutting tool is removed from the skin after cutting the skin. Figures 3, 4, and 5 are partial sectional views showing the second, third, and fourth embodiments, respectively;
Fig. 6 is a perspective view showing a conventional cutting tool, Fig. 7 is a partially cutaway front view showing the state in which the cutting tool is applied to the skin and cutting, and Fig. 8 is a partially cutaway front view showing the cutting tool being removed from the skin after cutting the skin. It is a partially cutaway front view showing the state. Handle portion 1, blade portion 2, cutting edge 3, inner peripheral surface 3a, skin piece S1.

Claims (1)

[Claims] 1 Consists of a cylindrical blade part 2 having the same diameter as the handle part 1 and the outer peripheral surface and a cutting edge 3 at the lower end, and the inner peripheral surface 3a of this cutting edge 3 is expanded outward so that the lower end side is widest. A skin excision tool characterized by being opened.